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Peter Falconio's mother left the court today after becoming
distressed by video footage displayed to the jury.

The half-hour police video played to the Northern Territory
Supreme Court today showed a dark stain alongside the Stuart
Highway where the British backpacker, whose body has not been
found, was allegedly attacked.

When the footage was displayed, Mr Falconio's mother Joan got up
and left the court, clearly distressed.

The video also showed vehicle tracks leading to the orange Kombi
owned by Mr Falconio and his then-girlfriend, Joanne Lees.

Bradley John Murdoch, 47, has pleaded not guilty to the murder
of 28-year-old Mr Falconio and not guilty to unlawfully assaulting
Ms Lees, and depriving her of her liberty beside the outback
highway in July 2001.

Ms Lees has told the court her boyfriend disappeared after he
went to the back of the Kombi to speak to a man who had pulled them
over on the side of the highway four years ago.

She said she heard a loud bang before she was attacked by a
gunman.

The court was today hearing from police involved in the
investigation.

Alice Springs crime scene examiner Ian Spilsbury was explaining
parts of the police video to the jury as it was shown.